CHAMPAGNE-SOUTHERN COMFORT PUNCH

2 bottles champagne
1 bottle Southern Comfort
8 oz. pineapple juice
Mandarin orange slices
1 c. grape fruit juice
1/2 c. lemon juice (fresh)
1 liter 7-Up

Fill ice ring with 2 parts 7-Up and 1 part water, add orange slices and freeze. In punch bowl mix remaining ingredients, including leftover 7-Up. Add ice ring, garnish with remaining mandarin oranges.